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-rw-r--r--extra/Configs/Config.in.arch1
-rw-r--r--libc/sysdeps/linux/m68k/bits/fenv.h98
-rw-r--r--libc/sysdeps/linux/m68k/fpu_control.h77
-rw-r--r--libm/m68k/Makefile.arch16
-rw-r--r--libm/m68k/fclrexcpt.c39
-rw-r--r--libm/m68k/fedisblxcpt.c36
-rw-r--r--libm/m68k/feenablxcpt.c36
-rw-r--r--libm/m68k/fegetenv.c33
-rw-r--r--libm/m68k/fegetexcept.c29
-rw-r--r--libm/m68k/fegetmode.c26
-rw-r--r--libm/m68k/fegetround.c28
-rw-r--r--libm/m68k/feholdexcpt.c42
-rw-r--r--libm/m68k/fesetenv.c63
-rw-r--r--libm/m68k/fesetexcept.c30
-rw-r--r--libm/m68k/fesetmode.c31
-rw-r--r--libm/m68k/fesetround.c35
-rw-r--r--libm/m68k/feupdateenv.c39
-rw-r--r--libm/m68k/fgetexcptflg.c32
-rw-r--r--libm/m68k/fraiseexcpt.c106
-rw-r--r--libm/m68k/fsetexcptflg.c38
-rw-r--r--libm/m68k/ftestexcept.c29
21 files changed, 809 insertions, 55 deletions
diff --git a/extra/Configs/Config.in.arch b/extra/Configs/Config.in.arch
index 960b67d4d..1ea42e6d1 100644
--- a/extra/Configs/Config.in.arch
+++ b/extra/Configs/Config.in.arch
@@ -166,6 +166,7 @@ config UCLIBC_HAS_FENV
depends on TARGET_i386 || \
TARGET_aarch64 || \
TARGET_arm || \
+ TARGET_m68k || \
TARGET_metag || \
TARGET_mips || \
TARGET_nds32 || \
diff --git a/libc/sysdeps/linux/m68k/bits/fenv.h b/libc/sysdeps/linux/m68k/bits/fenv.h
index b07f0ab51..37c5fe829 100644
--- a/libc/sysdeps/linux/m68k/bits/fenv.h
+++ b/libc/sysdeps/linux/m68k/bits/fenv.h
@@ -1,5 +1,4 @@
-/* Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
+/* Copyright (C) 1997-2025 Free Software Foundation, Inc.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
@@ -12,31 +11,38 @@
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
#ifndef _FENV_H
# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
#endif
+#if defined __HAVE_68881__ || defined __HAVE_FPU__ || defined __mcffpu__
+
/* Define bits representing the exception. We use the bit positions of
the appropriate bits in the FPSR Accrued Exception Byte. */
enum
{
- FE_INEXACT = 1 << 3,
-#define FE_INEXACT FE_INEXACT
- FE_DIVBYZERO = 1 << 4,
-#define FE_DIVBYZERO FE_DIVBYZERO
- FE_UNDERFLOW = 1 << 5,
-#define FE_UNDERFLOW FE_UNDERFLOW
- FE_OVERFLOW = 1 << 6,
-#define FE_OVERFLOW FE_OVERFLOW
- FE_INVALID = 1 << 7
-#define FE_INVALID FE_INVALID
+ FE_INEXACT =
+# define FE_INEXACT (1 << 3)
+ FE_INEXACT,
+ FE_DIVBYZERO =
+# define FE_DIVBYZERO (1 << 4)
+ FE_DIVBYZERO,
+ FE_UNDERFLOW =
+# define FE_UNDERFLOW (1 << 5)
+ FE_UNDERFLOW,
+ FE_OVERFLOW =
+# define FE_OVERFLOW (1 << 6)
+ FE_OVERFLOW,
+ FE_INVALID =
+# define FE_INVALID (1 << 7)
+ FE_INVALID
};
-#define FE_ALL_EXCEPT \
+# define FE_ALL_EXCEPT \
(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
/* The m68k FPU supports all of the four defined rounding modes. We use
@@ -44,21 +50,45 @@ enum
appropriate macros. */
enum
{
- FE_TONEAREST = 0,
-#define FE_TONEAREST FE_TONEAREST
- FE_TOWARDZERO = 1 << 4,
-#define FE_TOWARDZERO FE_TOWARDZERO
- FE_DOWNWARD = 2 << 4,
-#define FE_DOWNWARD FE_DOWNWARD
- FE_UPWARD = 3 << 4
-#define FE_UPWARD FE_UPWARD
+ FE_TONEAREST =
+# define FE_TONEAREST 0
+ FE_TONEAREST,
+ FE_TOWARDZERO =
+# define FE_TOWARDZERO (1 << 4)
+ FE_TOWARDZERO,
+ FE_DOWNWARD =
+# define FE_DOWNWARD (2 << 4)
+ FE_DOWNWARD,
+ FE_UPWARD =
+# define FE_UPWARD (3 << 4)
+ FE_UPWARD
};
+#else
+
+/* In the soft-float case, only rounding to nearest is supported, with
+ no exceptions. */
+
+# define FE_ALL_EXCEPT 0
+
+enum
+ {
+ __FE_UNDEFINED = -1,
+
+ FE_TONEAREST =
+# define FE_TONEAREST 0
+ FE_TONEAREST
+ };
+
+#endif
+
/* Type representing exception flags. */
typedef unsigned int fexcept_t;
+#if defined __HAVE_68881__ || defined __HAVE_FPU__ || defined __mcffpu__
+
/* Type representing floating-point environment. This structure
corresponds to the layout of the block written by `fmovem'. */
typedef struct
@@ -69,10 +99,30 @@ typedef struct
}
fenv_t;
+#else
+
+/* Keep ABI compatibility with the type used in the generic
+ bits/fenv.h, formerly used for no-FPU ColdFire. */
+typedef struct
+ {
+ fexcept_t __excepts;
+ }
+fenv_t;
+
+#endif
+
/* If the default argument is used we use this value. */
#define FE_DFL_ENV ((const fenv_t *) -1)
-#ifdef __USE_GNU
+#if defined __USE_GNU && (defined __HAVE_68881__ \
+ || defined __HAVE_FPU__ \
+ || defined __mcffpu__)
/* Floating-point environment where none of the exceptions are masked. */
# define FE_NOMASK_ENV ((const fenv_t *) -2)
#endif
+
+/* Type representing floating-point control modes. */
+typedef unsigned int femode_t;
+
+/* Default floating-point control modes. */
+# define FE_DFL_MODE ((const femode_t *) -1L)
diff --git a/libc/sysdeps/linux/m68k/fpu_control.h b/libc/sysdeps/linux/m68k/fpu_control.h
index 35ad95e6d..c3a9c6326 100644
--- a/libc/sysdeps/linux/m68k/fpu_control.h
+++ b/libc/sysdeps/linux/m68k/fpu_control.h
@@ -1,6 +1,5 @@
/* 68k FPU control word definitions.
- Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
+ Copyright (C) 1996-2025 Free Software Foundation, Inc.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
@@ -13,8 +12,8 @@
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
#ifndef _FPU_CONTROL_H
#define _FPU_CONTROL_H
@@ -29,9 +28,9 @@
* 12 -> enable trap for OVFL exception
* 11 -> enable trap for UNFL exception
* 10 -> enable trap for DZ exception
- * 9 -> enable trap for INEX2 exception
- * 8 -> enable trap for INEX1 exception
- * 7-6 -> Precision Control
+ * 9 -> enable trap for INEX2 exception (INEX on Coldfire)
+ * 8 -> enable trap for INEX1 exception (IDE on Coldfire)
+ * 7-6 -> Precision Control (only bit 6 is used on Coldfire)
* 5-4 -> Rounding Control
* 3-0 -> zero (read as 0, write as 0)
*
@@ -53,50 +52,66 @@
#include <features.h>
+#if defined (__mcoldfire__) && !defined (__mcffpu__)
+
+# define _FPU_RESERVED 0xffffffff
+# define _FPU_DEFAULT 0x00000000
+# define _FPU_GETCW(cw) ((cw) = 0)
+# define _FPU_SETCW(cw) ((void) (cw))
+
+#else
+
/* masking of interrupts */
-#define _FPU_MASK_BSUN 0x8000
-#define _FPU_MASK_SNAN 0x4000
-#define _FPU_MASK_OPERR 0x2000
-#define _FPU_MASK_OVFL 0x1000
-#define _FPU_MASK_UNFL 0x0800
-#define _FPU_MASK_DZ 0x0400
-#define _FPU_MASK_INEX1 0x0200
-#define _FPU_MASK_INEX2 0x0100
+# define _FPU_MASK_BSUN 0x8000
+# define _FPU_MASK_SNAN 0x4000
+# define _FPU_MASK_OPERR 0x2000
+# define _FPU_MASK_OVFL 0x1000
+# define _FPU_MASK_UNFL 0x0800
+# define _FPU_MASK_DZ 0x0400
+# define _FPU_MASK_INEX1 0x0200
+# define _FPU_MASK_INEX2 0x0100
/* precision control */
-#define _FPU_EXTENDED 0x00 /* RECOMMENDED */
-#define _FPU_DOUBLE 0x80
-#define _FPU_SINGLE 0x40 /* DO NOT USE */
+# ifdef __mcoldfire__
+# define _FPU_DOUBLE 0x00
+# else
+# define _FPU_EXTENDED 0x00 /* RECOMMENDED */
+# define _FPU_DOUBLE 0x80
+# endif
+# define _FPU_SINGLE 0x40 /* DO NOT USE */
/* rounding control */
-#define _FPU_RC_NEAREST 0x00 /* RECOMMENDED */
-#define _FPU_RC_ZERO 0x10
-#define _FPU_RC_DOWN 0x20
-#define _FPU_RC_UP 0x30
+# define _FPU_RC_NEAREST 0x00 /* RECOMMENDED */
+# define _FPU_RC_ZERO 0x10
+# define _FPU_RC_DOWN 0x20
+# define _FPU_RC_UP 0x30
-#define _FPU_RESERVED 0xFFFF000F /* Reserved bits in fpucr */
+# ifdef __mcoldfire__
+# define _FPU_RESERVED 0xFFFF800F
+# else
+# define _FPU_RESERVED 0xFFFF000F /* Reserved bits in fpucr */
+# endif
/* Now two recommended fpucr */
/* The fdlibm code requires no interrupts for exceptions. Don't
change the rounding mode, it would break long double I/O! */
-#define _FPU_DEFAULT 0x00000000
+# define _FPU_DEFAULT 0x00000000
/* IEEE: same as above, but exceptions. We must make it non-zero so
that __setfpucw works. This bit will be ignored. */
-#define _FPU_IEEE 0x00000001
+# define _FPU_IEEE 0x00000001
+
+/* Macros for accessing the hardware control word. */
+# define _FPU_GETCW(cw) __asm__ ("fmove%.l %!, %0" : "=dm" (cw))
+# define _FPU_SETCW(cw) __asm__ volatile ("fmove%.l %0, %!" : : "dm" (cw))
+#endif
/* Type of the control word. */
typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__)));
-/* Macros for accessing the hardware control word. */
-#define _FPU_GETCW(cw) __asm__ ("fmove%.l %!, %0" : "=dm" (cw))
-#define _FPU_SETCW(cw) __asm__ __volatile__ ("fmove%.l %0, %!" : : "dm" (cw))
-
-#if 0
/* Default control word set at startup. */
extern fpu_control_t __fpu_control;
-#endif
#endif /* _M68K_FPU_CONTROL_H */
diff --git a/libm/m68k/Makefile.arch b/libm/m68k/Makefile.arch
new file mode 100644
index 000000000..bd38690be
--- /dev/null
+++ b/libm/m68k/Makefile.arch
@@ -0,0 +1,16 @@
+# Makefile for uClibc-ng
+# Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+
+ifeq ($(UCLIBC_HAS_FENV),y)
+libm_ARCH_SRC:=$(wildcard $(libm_ARCH_DIR)/*.c)
+libm_ARCH_OBJ:=$(patsubst $(libm_ARCH_DIR)/%.c,$(libm_ARCH_OUT)/%.o,$(libm_ARCH_SRC))
+endif
+
+libm_ARCH_OBJS:=$(libm_ARCH_OBJ)
+
+ifeq ($(DOPIC),y)
+libm-a-y+=$(libm_ARCH_OBJS:.o=.os)
+else
+libm-a-y+=$(libm_ARCH_OBJS)
+endif
+libm-so-y+=$(libm_ARCH_OBJS:.o=.os)
diff --git a/libm/m68k/fclrexcpt.c b/libm/m68k/fclrexcpt.c
new file mode 100644
index 000000000..904ba5a19
--- /dev/null
+++ b/libm/m68k/fclrexcpt.c
@@ -0,0 +1,39 @@
+/* Clear given exceptions in current floating-point environment.
+ Copyright (C) 1997-2025 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+
+int
+feclearexcept (int excepts)
+{
+ fexcept_t fpsr;
+
+ /* Mask out unsupported bits/exceptions. */
+ excepts &= FE_ALL_EXCEPT;
+
+ /* Fetch the fpu status register. */
+ __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (fpsr));
+
+ /* Clear the relevant bits. */
+ fpsr &= ~excepts;
+
+ /* Put the new data in effect. */
+ __asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr));
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/m68k/fedisblxcpt.c b/libm/m68k/fedisblxcpt.c
new file mode 100644
index 000000000..c2c593e38
--- /dev/null
+++ b/libm/m68k/fedisblxcpt.c
@@ -0,0 +1,36 @@
+/* Disable floating-point exceptions.
+ Copyright (C) 2000-2025 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+
+int
+fedisableexcept (int excepts)
+{
+ unsigned int old_exc, new_exc;
+
+ /* Get the current control register contents. */
+ __asm__ ("fmove%.l %!,%0" : "=dm" (new_exc));
+
+ old_exc = (new_exc >> 6) & FE_ALL_EXCEPT;
+
+ excepts &= FE_ALL_EXCEPT;
+
+ new_exc &= ~(excepts << 6);
+ __asm__ ("fmove%.l %0,%!" : : "dm" (new_exc));
+
+ return old_exc;
+}
diff --git a/libm/m68k/feenablxcpt.c b/libm/m68k/feenablxcpt.c
new file mode 100644
index 000000000..9c01dc28b
--- /dev/null
+++ b/libm/m68k/feenablxcpt.c
@@ -0,0 +1,36 @@
+/* Enable floating-point exceptions.
+ Copyright (C) 2000-2025 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+
+int
+feenableexcept (int excepts)
+{
+ unsigned int new_exc, old_exc;
+
+ /* Get the current control register contents. */
+ __asm__ ("fmove%.l %!,%0" : "=dm" (new_exc));
+
+ old_exc = (new_exc >> 6) & FE_ALL_EXCEPT;
+
+ excepts &= FE_ALL_EXCEPT;
+
+ new_exc |= excepts << 6;
+ __asm__ ("fmove%.l %0,%!" : : "dm" (new_exc));
+
+ return old_exc;
+}
diff --git a/libm/m68k/fegetenv.c b/libm/m68k/fegetenv.c
new file mode 100644
index 000000000..2cd0a7c88
--- /dev/null
+++ b/libm/m68k/fegetenv.c
@@ -0,0 +1,33 @@
+/* Store current floating-point environment.
+ Copyright (C) 1997-2025 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+
+int
+fegetenv (fenv_t *envp)
+{
+#ifdef __mcoldfire__
+ __asm__ ("fmove%.l %/fpcr,%0" : "=dm" (envp->__control_register));
+ __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (envp->__status_register));
+ __asm__ ("fmove%.l %/fpiar,%0" : "=dm" (envp->__instruction_address));
+#else
+ __asm__ ("fmovem%.l %/fpcr/%/fpsr/%/fpiar,%0" : "=m" (*envp));
+#endif
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/m68k/fegetexcept.c b/libm/m68k/fegetexcept.c
new file mode 100644
index 000000000..1be3f8bf5
--- /dev/null
+++ b/libm/m68k/fegetexcept.c
@@ -0,0 +1,29 @@
+/* Get enabled floating-point exceptions.
+ Copyright (C) 2000-2025 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+
+int
+fegetexcept (void)
+{
+ unsigned int exc;
+
+ /* Get the current control register contents. */
+ __asm__ ("fmove%.l %!,%0" : "=dm" (exc));
+
+ return (exc >> 6) & FE_ALL_EXCEPT;
+}
diff --git a/libm/m68k/fegetmode.c b/libm/m68k/fegetmode.c
new file mode 100644
index 000000000..19f49922a
--- /dev/null
+++ b/libm/m68k/fegetmode.c
@@ -0,0 +1,26 @@
+/* Store current floating-point control modes. M68K version.
+ Copyright (C) 2016-2025 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fegetmode (femode_t *modep)
+{
+ _FPU_GETCW (*modep);
+ return 0;
+}
diff --git a/libm/m68k/fegetround.c b/libm/m68k/fegetround.c
new file mode 100644
index 000000000..02f6c4c41
--- /dev/null
+++ b/libm/m68k/fegetround.c
@@ -0,0 +1,28 @@
+/* Return current rounding direction.
+ Copyright (C) 1997-2025 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+
+int
+fegetround (void)
+{
+ int fpcr;
+
+ __asm__ ("fmove%.l %!,%0" : "=dm" (fpcr));
+
+ return fpcr & FE_UPWARD;
+}
diff --git a/libm/m68k/feholdexcpt.c b/libm/m68k/feholdexcpt.c
new file mode 100644
index 000000000..c0891969a
--- /dev/null
+++ b/libm/m68k/feholdexcpt.c
@@ -0,0 +1,42 @@
+/* Store current floating-point environment and clear exceptions.
+ Copyright (C) 1997-2025 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+
+int
+feholdexcept (fenv_t *envp)
+{
+ fexcept_t fpcr, fpsr;
+
+ /* Store the environment. */
+#ifdef __mcoldfire__
+ __asm__ ("fmove%.l %/fpcr,%0" : "=dm" (envp->__control_register));
+ __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (envp->__status_register));
+ __asm__ ("fmove%.l %/fpiar,%0" : "=dm" (envp->__instruction_address));
+#else
+ __asm__ ("fmovem%.l %/fpcr/%/fpsr/%/fpiar,%0" : "=m" (*envp));
+#endif
+
+ /* Now clear all exceptions. */
+ fpsr = envp->__status_register & ~FE_ALL_EXCEPT;
+ __asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr));
+ /* And set all exceptions to non-stop. */
+ fpcr = envp->__control_register & ~(FE_ALL_EXCEPT << 6);
+ __asm__ __volatile__ ("fmove%.l %0,%!" : : "dm" (fpcr));
+
+ return 0;
+}
diff --git a/libm/m68k/fesetenv.c b/libm/m68k/fesetenv.c
new file mode 100644
index 000000000..873eb9abe
--- /dev/null
+++ b/libm/m68k/fesetenv.c
@@ -0,0 +1,63 @@
+/* Install given floating-point environment.
+ Copyright (C) 1997-2025 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+
+int
+fesetenv (const fenv_t *envp)
+{
+ fenv_t temp;
+
+ /* Install the environment specified by ENVP. But there are a few
+ values which we do not want to come from the saved environment.
+ Therefore, we get the current environment and replace the values
+ we want to use from the environment specified by the parameter. */
+#ifdef __mcoldfire__
+ __asm__ ("fmove%.l %/fpcr,%0" : "=dm" (temp.__control_register));
+ __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (temp.__status_register));
+ __asm__ ("fmove%.l %/fpiar,%0" : "=dm" (temp.__instruction_address));
+#else
+ __asm__ ("fmovem%.l %/fpcr/%/fpsr/%/fpiar,%0" : "=m" (*&temp));
+#endif
+
+ temp.__status_register &= ~FE_ALL_EXCEPT;
+ temp.__control_register &= ~((FE_ALL_EXCEPT << 6) | FE_UPWARD);
+ if (envp == FE_DFL_ENV)
+ ;
+ else if (envp == FE_NOMASK_ENV)
+ temp.__control_register |= FE_ALL_EXCEPT << 6;
+ else
+ {
+ temp.__control_register |= (envp->__control_register
+ & ((FE_ALL_EXCEPT << 6) | FE_UPWARD));
+ temp.__status_register |= envp->__status_register & FE_ALL_EXCEPT;
+ }
+
+#ifdef __mcoldfire__
+ __asm__ __volatile__ ("fmove%.l %0,%/fpiar"
+ :: "dm" (temp.__instruction_address));
+ __asm__ __volatile__ ("fmove%.l %0,%/fpcr"
+ :: "dm" (temp.__control_register));
+ __asm__ __volatile__ ("fmove%.l %0,%/fpsr"
+ :: "dm" (temp.__status_register));
+#else
+ __asm__ __volatile__ ("fmovem%.l %0,%/fpcr/%/fpsr/%/fpiar" : : "m" (*&temp));
+#endif
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/m68k/fesetexcept.c b/libm/m68k/fesetexcept.c
new file mode 100644
index 000000000..6ae4a55ea
--- /dev/null
+++ b/libm/m68k/fesetexcept.c
@@ -0,0 +1,30 @@
+/* Set given exception flags. M68K version.
+ Copyright (C) 2016-2025 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+
+int
+fesetexcept (int excepts)
+{
+ fexcept_t fpsr;
+
+ __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (fpsr));
+ fpsr |= excepts & FE_ALL_EXCEPT;
+ __asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr));
+
+ return 0;
+}
diff --git a/libm/m68k/fesetmode.c b/libm/m68k/fesetmode.c
new file mode 100644
index 000000000..a7e93d616
--- /dev/null
+++ b/libm/m68k/fesetmode.c
@@ -0,0 +1,31 @@
+/* Install given floating-point control modes. M68K version.
+ Copyright (C) 2016-2025 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fesetmode (const femode_t *modep)
+{
+ femode_t mode;
+ if (modep == FE_DFL_MODE)
+ mode = _FPU_DEFAULT;
+ else
+ mode = *modep;
+ _FPU_SETCW (mode);
+ return 0;
+}
diff --git a/libm/m68k/fesetround.c b/libm/m68k/fesetround.c
new file mode 100644
index 000000000..a8abc4e6e
--- /dev/null
+++ b/libm/m68k/fesetround.c
@@ -0,0 +1,35 @@
+/* Set current rounding direction.
+ Copyright (C) 1997-2025 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+
+int
+fesetround (int round)
+{
+ fexcept_t fpcr;
+
+ if (round & ~FE_UPWARD)
+ /* ROUND is no valid rounding mode. */
+ return 1;
+
+ __asm__ ("fmove%.l %!,%0" : "=dm" (fpcr));
+ fpcr &= ~FE_UPWARD;
+ fpcr |= round;
+ __asm__ __volatile__ ("fmove%.l %0,%!" : : "dm" (fpcr));
+
+ return 0;
+}
diff --git a/libm/m68k/feupdateenv.c b/libm/m68k/feupdateenv.c
new file mode 100644
index 000000000..29dcc712e
--- /dev/null
+++ b/libm/m68k/feupdateenv.c
@@ -0,0 +1,39 @@
+/* Install given floating-point environment and raise exceptions.
+ Copyright (C) 1997-2025 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+
+int
+feupdateenv (const fenv_t *envp)
+{
+ fexcept_t fpsr;
+
+ /* Save current exceptions. */
+ __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (fpsr));
+ fpsr &= FE_ALL_EXCEPT;
+
+ /* Install new environment. */
+ fesetenv (envp);
+
+ /* Raise the saved exception. Incidentally for us the implementation
+ defined format of the values in objects of type fexcept_t is the
+ same as the ones specified using the FE_* constants. */
+ feraiseexcept ((int) fpsr);
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/m68k/fgetexcptflg.c b/libm/m68k/fgetexcptflg.c
new file mode 100644
index 000000000..7a564555b
--- /dev/null
+++ b/libm/m68k/fgetexcptflg.c
@@ -0,0 +1,32 @@
+/* Store current representation for exceptions.
+ Copyright (C) 1997-2025 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+
+int
+fegetexceptflag (fexcept_t *flagp, int excepts)
+{
+ fexcept_t fpsr;
+
+ /* Get the current exceptions. */
+ __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (fpsr));
+
+ *flagp = fpsr & excepts & FE_ALL_EXCEPT;
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/m68k/fraiseexcpt.c b/libm/m68k/fraiseexcpt.c
new file mode 100644
index 000000000..4599c08f7
--- /dev/null
+++ b/libm/m68k/fraiseexcpt.c
@@ -0,0 +1,106 @@
+/* Raise given exceptions.
+ Copyright (C) 1997-2025 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+#include <float.h>
+#include <math.h>
+
+int
+feraiseexcept (int excepts)
+{
+#if defined(__mcffpu__)
+
+ /* The Coldfire FPU allows an exception to be raised by asserting
+ the associated EXC bit and then executing an arbitrary arithmetic
+ instruction. fmove.l is classified as an arithmetic instru